Plunging furnace.



PABTENTED APR.14,11908. z. SZPOR. I PLUNGING FURNACE.

APPLICATION FILED 111 3.19. I907.-

0., wasuuvamu. n. c.

ZDZISLAW SZPOR, OF STANISLAWOW, AUSTRIA-HUN GARY.

PLUNGING FURNACE.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed April 19, 1907. Serial No. 369,132.

To all whom it may concern:

Be it known that I, ZDZISLAW SzPoR, a subj ect of the Emperor of Austria-Hungary, and resident of Stanislawoy Galicia, Austria, have invented certain new and useful Improvements in Plunging Furnaces, of which the following is a specification.

The present invention relates to a furnace or stove which is used for heating liquids and which is plunged into the liquid which is to be heated the furnace does not however form an integral part of the receptacle containing this liquid. Conduits are provided for the admission of air and for withdrawing the products of combustion, said conduits eX- tending into the liquid and passing through the water-level.

In order that the invention may be clearly understood reference is made to the accompanying drawing in which Figure 1 is a vertical longitudinal section through the plunging furnace; Fig. 2 is an end elevation of the same; Fig. 3 is a plan of the same with part broken away. Fig. 4 is an elevation of the so called air distributer; Fig. 5 is an elevation of a hook used for the ignition.

Similar letters of reference refer to similar parts in all views.

The plunging furnace or stove according to Figs. 1 to 3 consists firstly of a fire-shaft F which is open at the upper end and provided with a cover D; the combustion of the fuel is effected in this shaft F. At the side of this fire-shaft F is an air-shaft L which admits the necessary air for combustion to the fire-shaft at as low a place as possible. Further, and likewise at the side of the fire-shaft F, there is provided a shaft f, the main purpose of which is to admit the air which is necessary for complete combustion by means of an air distributer V in the shaft f to the hot gases which escape from the fire-shaft and which possibly are still capable of combustion. A row or series of fire tubes H situated one beside another leads from the lower part of said shaft f or of the fire-shaft F to the outlet pipe A whichopens into the chimney K, the products of combustion being led away through the latter. The lower edge of the chimney K or the upper edge of the outlet pipe A is preferably provided with an annular channel R which holds the fuel necessary for preliminarily heating the chimney. Both the airshaft L and the shaft f are open at their upper ends, but are provided with dampers S, S, by which the admission of air can be regulated.

The air distributer V is formed of a number of tubes open at both ends arranged like a grate (Fig. 4) which are preferably held in a common plate which blocks the shaft, so that the air which is admitted must pass through these pipes and is supplied to the hot gases which flow through between these tubes. At the same time, however, this air distributer acts like a grate protecting the fire tubes from becoming covered up with the fuel which is in the fire chamber F.

This plunging furnace or stove is employed in the following manner: The furnace or stove is plunged into the liquid which is to be heated in such a manner that all the open ends of the shaft project somewhat out of the liquid. The necessary quantity of fuel,

for example charcoal, is then inserted into the fire-shaft, the outlet pipe A is provided with a chimney, the fire-shaft and the two dampers S, S are closed, the channel R is filled with fuel such as spirit, for example, and the latter ignited. The chimney is thus preliminarily heated and a draft of air is formed upwards through the chimney. When the chimney is sufliciently heated, a hook h (Fig. 5) which has its end covered with a wick, wadding, or the like, is soaked with spirit or the like, ignited and inserted in the air-shaft L after opening the damper S. The draft which is caused by the chimney being heated first draws the flame into the fire-shaft F, whereby the fuel which is contained therein is ignited. The hot gases which then escape through the chimney maintain the proper draft even if the fuel in the channel R has burned out. Now if complete combustion does not take place in the fire-shaft, that is to say, if the escaping gases are capable of still further combustion, which takes place for example when carbon is intensely heated, when the temperature of combustion in the fire-shaft exceeds 700 C., and the carbon is partially or entirely burned to carbon monoxid, which may be known by flames being visible under the air distributer V after opening the damper S, this damper S must then be kept sufficiently open in order that the air which is necessary for complete combustion can flow in.

' If a stove in a room is available with which the outlet pipe of the plunging furnace can be connected by means of a suitable pipe, the products of combustion find the most suitable way out, and the natural draft of the stove suffices for commencing the fire without it being necessary to heat the chimney beforehand. I

The fuels for use with the above described plunging furnace or stove may be quite various. Besides solid fuels, such as, for example, wood, coal, and so on, liquid or gaseous fuels, for example, naphtha, spirit, illuminating gas, and so on, may also be used without departing from the spirit and scope of the present invention. Of course in each case a correspondingly suitable construction of burner or a corresponding formation of the heating device is necessary.

The advantages which may be obtained with such a plunging furnace are at once clear without further elucidation. Firstly, large quantities of liquid, for example when preparing hot baths and the like can be heated without difficulty and without occupying much space and expensive devices in optional receptacles, indeed in wooden vessels. Further, the consumption of fuel is relatively small as the liquid contacts directly with the hottest sides of the stove, so that on the one hand a rapid circulation of the water or other fluid occurs, and on the other hand the heating of the entire contents of the vessel to be heated is effected quickly. Naturally the plunging furnace may be made in very dif ferent sizes, its form being suitably varied in order to suit the circumstances of each case.

What I claim as my invention and desire to secure by Letters Patent is:

1. A plunging furnace comprising a fire shaft, a smoke discharge pipe, means for connecting the lower ends of said shaft and pipe, a primary air supply pipe, a secondary air supply pipe and an air distributer at the lower end of the secondary air supply pi e.

2. A plunging furnace comprising a e shaft, a smoke discharge pipe, means for connecting the lower ends of said shaft and pipe,

a primary air supply pipe a secondary supply pipe and an air distributer at the lower end of the secondary air supply pipe, said distributer being composed of air tubes spaced apart to form a grate.

In witness whereof I have hereunto set my hand in presence of two Witnesses.

ZDZISLAW SZPOR.

Witnesses:

ALVESTO S. HOGUE, AUGUST FUGGER. 

